Lumber blanking and chipping machine



B. w. ANDRUS ETAL 2,966,182

LUMBER BLANKING AND CHIPPING MACHINE Dec. 27, 1960 2 Sheets-Sheet 1 Filed Nov. 1a, 1958 INVENTOR. BUDD W. ANDRUS GUSTAVE A HALLSTROM ATTORNEYS 7, 1-960 B.w.ANDRus Em 2,96

LUMBER BLANKING AND CHIPPING MACHINE Filed Nov. 18, 1958 2 Sheets-Sheet 2 INVENTOR. BUDD W. ANDRUS GUS TAVE A. HALLSTROM ATTORNEYS United States Patent C LUlVlBER BLANKING AND CHIPPING MACHINE Budd W. Andrus, 3382 Elmira Road, and Gustave A. Hallstrom, 3445 Wood Ave., both of Eugene, Oreg.

Filed Nov. 18, 1958, Ser. No. 774,747

3 Claims. (Cl. 144-176) This invention relates to a lumber blanking and chipping machine used in the sizing of lumber by removing chips instead of shavings.

The primary object of the invention is to provide a machine to size lumber by removing chips instead of shavings so that the chips can be used in the making of paper pulp and the saving of valuable pulp material is accomplished.

Heretofore when the lumber was sized or blanked through planers, the material removed was in the form of shavings which were not useable for making paper pulp and had to be burned in a refuse burner. In shavings the fibers are of such a nature that they cannot be made into wood pulp.

After the lumber has been blanked or sized, it then can be run through a planer and finished, requiring a minimum amount of removal of material in the form of shavings in order to complete the finished lumber.

From the above objects, it can be readily seen that this new and improved lumber blanking and sizing machine will salvage considerable useable material for making of pulp, which today is now being burned and lost.

Other objects and advantages will become apparent in the following specification when considered in the light of the attached drawings, in which:

Figure 1 is a plan view of the invention;

Figure 2 is a side elevational view of the structure shown in Figure 1;

Figure 3 is a vertical sectional view, taken on line 33 of Figure 2, looking in the direction of the arrows;

Figure 4 is a vertical sectional view, taken on line 44 of Figure 2, looking in the direction of the arrows;

Figure 5 is an enlarged fragmentary plan view of one of the chip cutters and mounting thereof;

Figure 6 is an enlarged fragmentary sectional view, taken on line 6-6 of Figure 5, looking in the direction of the arrows;

Figure 7 is an enlarged fragmentary sectional view, taken on line 77 of Figure 5, looking in the direction of the arrows;

Figure 8 is a perspective view of one of the chipper blades removed from the rotor;

Figure 9 is a perspective view of one of the chips removed from the lumber.

Figure 10 is a plan view of a modified form of cutter head; and

Figure 11 is a side view of the structure shown in Figure 10.

Figure 12 is an enlarged sectional view taken substantially along the line 1212 of Fig. 2 as viewed in the direction indicated by the arrows.

Referring now to the drawings in detail wherein like reference characters indicate like parts throughout the several figures, the reference character C indicates generally a lumber blanking and chip making machine constructed in accordance with the invention.

The lumber blanking and chip making machine C includes a basic framework F having side frames 15 and 15A secured together by cross members 16. A horizontally disposed disk-like chipping head rotor 17 is keyed to a vertical driving shaft 18, as best illustrated in Figure 3.

The shaft 18 is journalled in a bearing 19 supported on an inverted U-shaped frame 20. The legs 20A of the frame 20 operate in vertical guide ways 22 removably supported on the side frames 15 and 15A of the frame F.

The U-sha-ped frame 20 is adjustable vertically for determining the vertical position of the chipping rotor 17 to control the thickness of lumber being processed through the machine C over a supporting table 21 carried by the frame F.

Vertical adjusting screws 20B are journalled in the guides 22. Threaded arms 20C, forming part of the legs 20A, are threaded to the shaft 20B. The shafts 20B are geared together by a cross chain 20D, and are revolved by a crank 20E, integrally secured to one of the shafts 293. The chipper head rotor 17 is revolved by motor 23 supported on the bearing 19 and driving the vertical shaft 18.

Referring to Figures 1 and 4, a blanking and chipping rotor 24 is disposed in a vertical plane and is keyed to a horizontal driving shaft 25 journalled in bearings 26. The bearings 26 are fixedly mounted to the supporting bracket assembly 27 through a base 28. The supporting bracket assembly 27 is supported from the adjustable lumber supporting table 29 by means of bracket arms 30 fixedly secured at 31 to the underside of the table 29 by suitable means such as welding. The shaft 25 is driven by a motor 32, which also is mounted on the bracket assembly 27. The lumber support table 29 is mounted on the frame P so as to be movable transversely of the machine C.

Inverted dove-tail rails 33 are fixedly secured to the underside of the table 29 to move in the dove-tail supporting guideways 34 fixedly secured between the side frames 15 and 15A of the frame F, referring particularly to Figures 2 and 4.

The position of the table 29 is determined by a feed screw 35, which is journalled in the side frame 15A by a bearing 36 and threaded through a threaded boss 37 forming part ofthe bracket assembly 27. The screw 35 has a crank 38 formed on its outer end for operating the same.

Chip cutting blades 39 are mounted on the rotors 17 and 24 in the following manner. The rotors 17 and 24 are cut along a line 40 and a portion 41 thereof is bent downwardly along the line 42. A filler 43 is secured to the inner side of the portion 41 and to the underside of the rotors 17 and 24 to reinforce the downwardly turned portion 41. The chip cutting blade 39 is bolted to the portion 41 by bolts 44.

Referring to Figure 8 particularly, the major portion of the chipping blade 39, located between the edge 45 and the point 46, is disposed at a parallel plane in regards to the lumber being blanked, while a portion of the blade 39 from the point 46 to the edge 47 is disposed at an incline to the parallel plane of the lumber. The object of this inclined portion is to determine the length of chip to be removed from the lumber corresponding to the cut edge 48 of the chip 49, referring to Figure 9.

The piece of lumber to be blanked, indicated by numeral 50, is guided through the machine C against a guide rail 51, which forms the upper part of the side frame 15A, and is moved through the machine C by feed rollers 52 and 53 underlying the pressure rollers 54 and 55. The piece of lumber 51) is further stabilized by hold down shoes 56 and 57. The hold down shoes 56, 57 each include a vertically disposed pedestal 58 vertically adjustably mounted in guide bearings 59. The pedestals 58 are raised and lowered by a threaded screw 60 rotatably mounted within the guide bearings 59 at 61. When the 3 screws 60 are rotated they raise and lower the pedestals 58 by means of threaded nuts 62 threaded thereon and secured to the pedestals 58.

, The threaded screws 60 are revolved by means of bevel gears 63 hand rotated by cranks 64. A horizontally disposedrhold down shoe arm 66 is formed on the upper end of the pedestal 58 to hold the pie ce of lumber 50 in contact with the supporting tables 21 and 29.

A modified form of chipper cutting disk is shown in Figures and 11. In this form of the invention the cutting blades 69 are formed integrally with the disk 68, their width determining the length of chip to be removed from the lumber 50A. The periphery of the disk 68,

. the uncut portion of the lumber 50A, preventing the forward movement of the lumber 50A from exceeding the cut of the cutter blades 69.

In Figure 11 we illustrate that the blades 69 are practically on the same plane as the disk 68. The disk 68 acts as a hold down shoe in reference to the lumber 50A, the depth of the cutter blade 68 determining the amount to be removed from the lumber 50A.

In the use and operation of the lumber blanking and chipper machine C, the lumber 50 is fed into the horizontally disposed rotor 17 by feed roller 52 and passes under the shoes 56. As the rotor 17 revolves in the direction of the arrow, it cuts at approximately a 45 degree a from, as best illustrated in Figures 5, 6 and 7, thelength of thechip being determined by the rate of forward movement of the lumber 50 past the rotor 17.

. When the lumber 50 reaches the rotor 24, driven in the direction indicated in Figure 2, the blades 39 crossing the lumber 50 at approximately a 45 degree angle to the center of the rotor 24 will remove chips from the edge of the lumber 50.

The transverse position of the table 29 and the rotor 24 will be determined by adjustment of the crank 38 moving the table 29 transversely of the machine C. The depth of cut performed by the horizontally disposed rotor 17 will be determined by the elevation of the inverted U-shape supporting frame 20, which is determined by the feed shafts 20B through action of the hand crank 20E, referring particularly to Figure 3. The feed roller 53 catches the end of the lumber 50, completing its movement through the machine C. Additional feed rollers may be associated with the machine C as required.

Referring to Figures 5 through 7 and 9, it will be noted that the chips 49 consist of relatively long fibres making them useable in the making of wood or paper pulp. 7'

Having thus described the preferred embodiments of the invention, it should be understood that numerous structural modifications and adaptations may be resorted to without departing from the scope of the appended claims.

What is claimed is: V

l. A lumber blanking and chippingmachine comprising an elongated generally horizontal frame, a plurality of horizontally disposed transverse feed rollers positioned in horizontally aligned relation in said frame, an inverted U-shaped frame engaging over opposite sides of said first named frame and vertically adjustably supported on said first named frame, a motor supported centrally of said U-shaped frame and having a vertical depending shaft extending below said U-shaped frame, a chipper disk mounted on said motor shaft for horizontal rotation by said motor, a plurality of chipper blades mounted adjacent the peripheral edge of said chipper disk and depending therefrom, a transversely adjustable lumber support table secured to said first named frame, a bracket secured to said table and extending laterally therefrom, a motor mounted on said bracket and h-aving a horizontally extending motor shaft, a vertically disposed chipper disk mounted on said last named motor shaft for vertical rotation with said motor shaft, a plurality of chipper blades secured to said last named chipper disk adjacent the peripheral edge thereof, and a guide mounted on said frame for engaging the edge of lumber passing through said machine.

2. A device as claimed in claim 1 wherein a plurality of vertically adjustable hold down shoes are mounted on said first named frame for engaging the upper surface of lumber passing through said machine.

3. A device as claimed in claim 1 wherein a pressure roller is mounted in overlying relation with respect to each of said feed rollers to maintain the lumber passing through said machine in contact with said feed rollers.

References Cited in the'file of this patent UNITED STATES PATENTS 

